bootsrap nav-bar collapsable cannot make it work

Both jQuery and Bootstrap.js should be included with jQuery placed before Bootstrap.js.

Note: The version of jQuery that can be used will vary depending on the version of Bootstrap being used (or vice versa).


Bootstrap Version 4

JS Many of our components require the use of JavaScript to function.
Specifically, they require jQuery, Popper.js, and our own JavaScript
plugins. Place the following <script>s near the end of your pages,
right before the closing </body> tag, to enable them. jQuery must come
first, then Popper.js, and then our JavaScript plugins.

We use jQuery’s slim build, but the full version is also supported.


For Release v4.0.0-beta.2 package.json

"peerDependencies": {
    "jquery": "1.9.1 - 3",
    "popper.js": "^1.12.7"
},

Bootstrap Version 3

jQuery required

Please note that all JavaScript plugins require jQuery
to be included, as shown in the starter template. Consult our
bower.json
to see which versions of jQuery are supported.

For Release v3.3.7 Changelog & bower.json

"dependencies": {
    "jquery": "1.9.1 - 3"
}

For v3.3.6 bower.json

"dependencies": {
  "jquery": ">= 1.9.1 - 2"
}

For v3.3.0 – v3.3.5 bower.json

"dependencies": {
  "jquery": ">= 1.9.1"
}

This does not account for the release of jQuery v3.0


For v3.0.0rc1 – v3.2.0 bower.json

"dependencies": {
  "jquery": ">= 1.9.0"
}

This does not account for the release of jQuery v3.0

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